Answer: The measure of the angle at the top left corner measures 100°.
Explanation:
Since we have given that
Fabric is cut in the shape of a parallelogram.
Since the angle at the bottom left corner = 80°
And we need to find the measure of the angle at the top left corner.
Since the angle at the bottom left and top left forms adjacent angles.
Bottom left + Top left = 180°

Hence, the measure of the angle at the top left corner measures 100°.